Watch the PATS light on the dash. If it flashes an error code, there is a TSB that covers this (I think the code is 12). If everything looks normal, there's just no cranking, check the starter relay in the power distribution box in the engine compartment. The PDB is on the leading edge of the passenger-side wheel well, behind the passenger-side headlights. If the starter relay (relay #13, IIRC; it's listed in the manual) doesn't work, everything will act like a normal start, but you'll get a no-crank condition. You might be able to thump the relay and "un-stick" it temporarily, but if it's the problem, you'll need to replace it. As I understand it, all you need to do is pull the bad relay and plug the new one in its place, but mine was fixed under warranty, so I haven't done it myself.